package com.fxd.gateway.filter;

import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.gateway.filter.GatewayFilterChain;
import org.springframework.cloud.gateway.filter.GlobalFilter;
import org.springframework.core.Ordered;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.http.server.reactive.ServerHttpResponse;
import org.springframework.stereotype.Component;
import org.springframework.web.server.ServerWebExchange;
import reactor.core.publisher.Mono;

/**
 * 默认过滤器需要断言通过，而全局过滤器不需要
 *
 * @author xudongfu
 * @date 2025/06/16
 */
@Component
@Slf4j
public class RtGlobalFilter implements GlobalFilter, Ordered {

    @Override
    public Mono<Void> filter(ServerWebExchange exchange, GatewayFilterChain chain) {

        ServerHttpRequest request = exchange.getRequest();
        ServerHttpResponse response = exchange.getResponse();

        String uri = request.getURI().toString();
        long start = System.currentTimeMillis();
        log.info("请求【{}】开始，时间: {}", uri, start);

        // 异步放行
        Mono<Void> filter = chain.filter(exchange).doFinally(
                (result) -> {
                    // 真正业务执行完成之后执行的函数
                    long end = System.currentTimeMillis();
                    log.info("结束【{}】结束：时间：{} 耗时: {} ms", uri, end, end - start);
                }
        );

        return filter;
    }

    @Override
    public int getOrder() {
        return 0;
    }
}
